Home / 1,501.20-2,071.44-911.79

Finding the Fourth Proportional to 1,501.20, 2,071.44 and 911.79

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Solution

The fourth proportional to 1,501.20, 2,071.44 and 911.79 is: 1,258.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.20 : 2,071.44 = 911.79 : x
  2. Step 2: Convert to fraction form
    1,501.20/2,071.44 = 911.79/x
  3. Step 3: Cross multiply
    1,501.20x = 2,071.44 × 911.79
  4. Step 4: Simplify right side
    1,501.20x = 1,888,718.28
  5. Step 5: Solve for x
    x = 1,888,718.28/1,501.20
  6. Step 6: Final answer
    x = 1,258.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.